I posted a Submission bout this around May of last year that still awaits, approval, but I think I should further explain with Trivia Evidence, since there'd be more than 1 link to look at:

You might notice here that Banjo-Kazooie is a Video Game Franchise that doesn't use Full on Voice Acting, but rather Garbled Noises by each of the characters. This can be explained by the developers.

As Stated in this Behind the Scenes of Banjo-Kazooie in Rare Replay.

Grant Kirkhope even says so when he made a Guest Appearance in a Banjo-Kazooie Let's Play.

Basically if the Game was to have full on Voice Acting, it would've needed to increase the development period of the games, as well as to save space on the Cartridges that they'd been using. But of course, not all franchises need to use full on voice acting in their games. Not even Mario would.

Overall, we can come up with voices of each of the characters by ourselves, as shown by even Beta64 at the start of his Banjo-Kazooie video: